Delete the partition.
Repair the disk (After booting off from another drive or disk)
Repartition the drive.
Install.
I had this issue before and it was a disk corruption.
I'm not sure what you meant by repairing the disk after booting off from another drive or disk but I just deleted my partition by going into bootcamp. Then I went to disk utility and Repaired the disk permissions, Verified the disk permissions, and verified the disk.

Then I repartitioned by going into bootcamp and I tried to install Windows again but with no success.